1. Department of Head and Neck Surgery Chris O'Brien Lifehouse Camperdown New South Wales Australia
2. Sydney School of Public Health, The University of Sydney Sydney New South Wales Australia
3. Department of Radiation Oncology St George Hospital Kogarah New South Wales Australia
4. Central Clinical School, Faculty of Medicine and Health, University of Sydney Sydney New South Wales Australia
5. Department of Otolaryngology–Head & Neck Surgery Faculty of Medicine and Health Sciences, Macquarie University Sydney New South Wales Australia
6. Department of Radiation Oncology Chris O'Brien Lifehouse Camperdown New South Wales Australia
7. Department of Medical Oncology Chris O'Brien Lifehouse Camperdown New South Wales Australia
8. Faculty of Medicine and Health Sciences Faculty of Medicine and Health Sciences, Macquarie University Sydney New South Wales Australia
9. Royal Prince Alfred Institute of Academic Surgery, Sydney Local Health District Camperdown New South Wales Australia